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141.
This paper investigates whether computer forensic tools (CFTs) can extract complete and credible digital evidence from digital crime scenes in the presence of file system anti-forensic (AF) attacks. The study uses a well-established six stage forensic tool testing methodology based on black-box testing principles to carry out experiments that evaluate four leading CFTs for their potential to combat eleven different file system AF attacks. Results suggest that only a few AF attacks are identified by all the evaluated CFTs, while as most of the attacks considered by the study go unnoticed. These AF attacks exploit basic file system features, can be executed using simple tools, and even attack CFTs to accomplish their task. These results imply that evidences collected by CFTs in digital investigations are not complete and credible in the presence of AF attacks. The study suggests that practitioners and academicians should not absolutely rely on CFTs for evidence extraction from a digital crime scene, highlights the implications of doing so, and makes many recommendations in this regard. The study also points towards immediate and aggressive research efforts that are required in the area of computer forensics to address the pitfalls of CFTs. 相似文献
142.
Omar Sanchez-Sibony 《Contemporary Politics》2012,18(1):109-126
The 2011 presidential elections in Peru was the third one held in the post-Fujimori era. A perusal of the campaign's political dynamics reveals pervasive anti-democratic behaviours, attitudes and rhetoric on the part of key political actors, showcasing the degree to which Peru remains an unconsolidated, precarious democracy. The second round presented a moral and political dilemma insofar as two unsavoury candidates of highly dubious democratic credentials vied for the presidency: Ollanta Humala, a former army lieutenant burdened by accusations of human rights violations who, additionally, led or supported two military uprisings; and Keiko Fujimori, the daughter of a convicted and jailed dictator who unabashedly touted the legacy of her father's authoritarian regime and surrounded herself with tainted fujimoristas. The paradox of this undesirable electoral outcome, which can be read as a popular rebuke of the status quo, is that it took place in the Latin American country posting the fastest economic growth over the past decade. 相似文献
143.
How do citizens of democratic polities translate their policy preferences into voting choices? Proximity and directional theories of issue voting offer different answers to this question that have strong implications for parties’ strategies. Controlled scenarios in imaginary two-candidate contests have gained popularity as a method to estimate proportions of proximity and directional voters in the population. However, this method is not always applicable in comparative research where scholars often have to study multiparty elections with observational data. In the present paper, I demonstrate how relative prevalence of different issue voting rules can be estimated using finite mixture modeling. Using both a paradigmatic and a recent case, I demonstrate that the mixture model predicts observed voting choices better than the alternatives. I also show how finite mixture modeling can be used to study individual-level characteristics of proximity and directional voters using education as an example. 相似文献
144.
Do parties respond to ethnopolitical context when nominating and placing ethnic minority candidates in open-list proportional representation (PR) systems? Open-list PR is by nature candidate centered. Candidates need to attract preference votes to succeed. Political leaders, we argue, anticipate candidates' ability to generate support and the extent of anti-minority sentiment in districts when nominating and placing candidates. To test our arguments, we analyze data on 8945 candidates competing across 124 localities in Latvia's 2017 local elections. Few studies have explored open-list systems in countries like Latvia where preference voting routinely alters list order. Other studies stress the role that context plays in ethnic minority representation, but often lack data on crucial indicators. Our results show that parties nominated more minority candidates in localities with more ethnic minority voters and fewer in those with larger noncitizen populations. We did not, however, find that ethnopolitical context affected list placement. 相似文献
145.
Ge Lin Ph.D. ; Gregory Elmes Ph.D. ; Mike Walnoha M.A. ; Xiannian Chen M.S. 《Journal of forensic sciences》2009,54(1):152-158
Abstract: This article examines the potential of a spatial-temporal method for analysis of forensic shoeprint data. The large volume of shoeprint evidence recovered at crime scenes results in varied success in matching a print to a known shoe type and subsequently linking sets of matched prints to suspected offenders. Unlike DNA and fingerprint data, a major challenge is to reduce the uncertainty in linking sets of matched shoeprints to a suspected serial offender. Shoeprint data for 2004 were imported from the Greater London Metropolitan Area Bigfoot database into a geographic information system, and a spatial-temporal algorithm developed for this project. The results show that by using distance and time constraints interactively, the number of candidate shoeprints that can implicate one or few suspects can be substantially reduced. It concludes that the use of space-time and other ancillary information within a geographic information system can be quite helpful for forensic investigation. 相似文献
146.
Kathrin Müller Drs. Günter Braunschweiger Ph.D. Rachel Klein Ph.D. Erich Miltner M.D. Peter Wiegand Ph.D. 《Journal of forensic sciences》2009,54(4):862-865
Abstract: We have developed a concept to enable the analyzing of degraded stains with limited DNA template quantity. Therefore we have constructed a short tandem repeat (STR) multiplex including the German DNA database systems (Q8). The amplicon lengths are smaller than 280 bp. For the validation of Q8 over 50 degraded samples were investigated. Amplifications were performed with “low copy number” PCR, the number of PCR cycles was increased to 33 and the reaction volume was decreased to 12.5 μL. Compared with the MPX2 and Nonaplex kit, the average success rate was increased using the Q8 kit by approximately 20% and 30%, respectively. The efficiency of a sensitive STR multiplex with reduced amplicon lengths was confirmed in comparing the success rates of Q8 for typing degraded samples and samples with limited amount of DNA template while partial profiles were observed with the majority of the samples using commercially available kits. 相似文献
147.
148.
本文简要回顾了技术创新能力以及构成要素的研究文献,结合复杂产品系统创新过程的特性,界定了复杂产品系统创新能力的概念,分析了复杂产品系统创新能力的构成要素。并提出了管理策略。 相似文献
149.
150.
Manfred Tietzel 《European Journal of Law and Economics》2001,12(3):159-171
Common-pool allocation systems do not have the best of reputations in economic literature, since they are normally connected with the dissipation of rents. The present case study argues that in the case of procurement and allocation of human organ transplants a reciprocal common-pool allocation system is superior other systems, including market allocation. 相似文献